Huh, i don't think i ever had that issue. I see what you mean but the game shouldn't keep scrolling anymore that what will fill up the window, prompting you each time to continue.
Sadly i haven't found a way to scroll the text back, i don't think they put in a way. But if you play in Half mode, that at least gives more real estate for the text to be displayed. F1 brings up the list of commands but again, nothing about scrolling the text back. If you try to go full screen with F4, it annoyingly erases all displayed text... so much for that idea to view it. For now, save often and be careful how fast you hit the enter key to move the text forward.